1 # SPDX-License-Identifier: GPL-2.0-only
3 tristate "XZ decompression support"
6 LZMA2 compression algorithm and BCJ filters are supported using
7 the .xz file format as the container. For integrity checking,
8 CRC32 is supported. See Documentation/staging/xz.rst for more information.
13 bool "x86 BCJ filter decoder" if EXPERT
18 bool "PowerPC BCJ filter decoder" if EXPERT
23 bool "ARM BCJ filter decoder" if EXPERT
27 config XZ_DEC_ARMTHUMB
28 bool "ARM-Thumb BCJ filter decoder" if EXPERT
33 bool "SPARC BCJ filter decoder" if EXPERT
37 config XZ_DEC_MICROLZMA
38 bool "MicroLZMA decoder"
41 MicroLZMA is a header format variant where the first byte
42 of a raw LZMA stream (without the end of stream marker) has
43 been replaced with a bitwise-negation of the lc/lp/pb
44 properties byte. MicroLZMA was created to be used in EROFS
45 but can be used by other things too where wasting minimal
46 amount of space for headers is important.
48 Unless you know that you need this, say N.
57 tristate "XZ decompressor tester"
61 This allows passing .xz files to the in-kernel XZ decoder via
62 a character special file. It calculates CRC32 of the decompressed
63 data and writes diagnostics to the system log.
65 Unless you are developing the XZ decoder, you don't need this